/* The following code example is taken from the book
 * "The C++ Standard Library - A Tutorial and Reference, 2nd Edition"
 * by Nicolai M. Josuttis, Addison-Wesley, 2012
 *
 * (C) Copyright Nicolai M. Josuttis 2012.
 * Permission to copy, use, modify, sell and distribute this software
 * is granted provided this copyright notice appears in all copies.
 * This software is provided "as is" without express or implied
 * warranty, and with no claim as to its suitability for any purpose.
 */
#include <iostream>
#include <string>
using namespace std;

int main(int argc, char** argv)
{
    const string delims(" \t,.;");
    string line;

    // for every line read successfully
    while (getline(cin, line)) {
        string::size_type begIdx, endIdx;
        // search beginning of the first word
        begIdx = line.find_first_not_of(delims);

        // while beginning of a word found
        while (begIdx != string::npos) {
            // search end of the actual word
            endIdx = line.find_first_of(delims, begIdx);

            if (endIdx == string::npos) {
                // end of word is end of line
                endIdx = line.length();
            }

            // print characters in reverse order
            for (int i = endIdx - 1; i >= static_cast<int>(begIdx); --i) {
                cout << line[i];
            }

            cout << ' ';
            // search beginning of the next word
            begIdx = line.find_first_not_of(delims, endIdx);
        }

        cout << endl;
    }
}
